Emerson Rosemount 3100 Series Reference Manual

138
Reference Manual
00809-0100-4840, Rev CB
Appendix F: Programming the 3102 and 3105 using HART
February 2015
Programming the 3102 and 3105 using HART
F.3.7 Upper blanking (P023)
This defines a zone close to the transmitter where echoes are to be ignored. Establishing this
zone eliminates echoes from false targets such as mounting fittings or the end of stub pipes.
Enter the vertical distance from the transmitter face to where a valid surface echo can be
detected. See Figure F-1 on page 137 for this zone in a tank geometry illustration.
Note
To avoid a false high level alarm, the upper blanking distance should not be set to less than the
factory default setting.
Note
The pulse transmission stops if the sum of the Lower Blanking (page 142) and Upper Blanking
and is greater than the Transmitter Bottom Reference (page 136).
Field Communicator or AMS Device
Manager
To view or change the upper blanking
distance
1. From the Home screen, select 2: Configure.
2. Select 2: Manual Setup.
3. Select 5: Engineering (3105) or
6: Engineering (3102).
4. Select 5: Upper Blanking P023.
5. If a change is required:
(a) Input the new blanking distance, and select “ENTER” to save it.
(b) Select “Send” or “Apply” to update the transmitter.
Note
When messages appear, take appropriate action if needed and select “OK”.
Fast Keys
2, 2, 5 [or 6], 5
Upper Blanking P023
1.000 ft
1.000 ft
ESC
DEL ENTER
HELP
w
s
q
a
z
Lock
Shift
@ &
á ü
x
e
d
c
r
f
v
t
g
b
y
h
n
u
j
m
*
-
+
/
.
0
7
4
1
8
5
2
9
6
3
i
k
o
l
FN
(Field Communicator Screen Shown)

Emerson Rosemount 3100 Series Specifications

General

Brand	Emerson
Model	Rosemount 3100 Series
Category	Transmitter
Language	English